5500mAh 21700-55P high-capacity power lithium battery

**5500mAh ultra-large capacity, 3.6V voltage, 12.0mΩ internal resistance**, 10A charging/30A discharging, ≤75.0g, NCM/NCA ternary chemistry, Changhong Sanjie’s top-tier 21700 high-capacity cells, optimized for high-end, long‑range applications.

Product Features

High charge–discharge rates: Designed for the most demanding professional power‑tool and other application scenarios, it can deliver ultra‑high discharge rates of up to 10–15C and support charging rates exceeding 2C.

Ultra-wide temperature performance: The battery can discharge at an ultra-low temperature of −40°C and operate at a high temperature of up to 80°C, while also delivering high‑rate discharge capability at low temperatures.

High Consistency: Produced on an intelligent manufacturing line, with end-to-end digitalization and high-precision control across all process steps, ensuring superior consistency and enhanced safety.

High Security: A fully integrated information system (CRM, PLM, SRM, MES, ERP) ensures high security.

产品分类：

Cylindrical lithium battery

21700

Keywords:

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5500mAh 21700-55P high-capacity power lithium battery
5500mAh 21700-55P high-capacity power lithium battery
5500mAh 21700-55P high-capacity power lithium battery
5500mAh 21700-55P high-capacity power lithium battery

The 21700-55P is a top‑tier, high‑capacity cell in the NCM/NCA ternary chemistry, conforming to the 21700 format. Its key selling points include an ultra‑large 5,500 mAh capacity, a stable 3.6 V nominal voltage, an internal resistance of 12.0 mΩ, 10 A fast charging, and 30 A discharge capability—making it ideal for high‑end, long‑life energy storage systems and electric‑powered devices. The cell employs premium high‑nickel NCM ternary cathode material and features optimized electrode and electrolyte designs to deliver exceptional capacity and stability. Manufacturing utilizes industry‑leading processes with precise, end‑to‑end quality control; each unit undergoes 100% full inspection and passes rigorous safety tests, ensuring uncompromising product quality. Its core advantages lie in its class‑leading capacity, balanced long‑cycle life and fast‑charging performance, with a capacity retention rate exceeding 80% after 500 cycles. Weighing no more than 75.0 g, it fits 21700‑format devices and exhibits excellent low‑temperature performance. Applications span high‑end energy storage, electric bicycles, and large portable equipment, with OEM/ODM customization options and premium technical support available.